Improved pile-driver



lUNTTED STATES PATENT OEEIGE JOHAN JACOB STUDER, RICHMOND, INDIANA.

IMPROVED PILE-DRIVER.

Specification forming part of Letters Patent No. 59,476, dated November 6, 1866.

To all whom it may concern:

'Be it known that I, JOHAN J. STUDER, of Richmond, in the county of Wayne and State of Indiana, have invented a new and useful Improvement in Steam Pile-Drivers, and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference be,- ing had to the annexed drawings, making part of this specication, in which- Figure l is a side elevation. Fig. 2 is a vertical section; Fig. 3, a horizontal section; Fig. 4, a horizontal section; Fig. 5, a vertical section of part of the machine; Fig. 6, a front elevation of a part; Fig. 7, a horizontalsection of another part 5' Fig. 8, also a horizontal section.

The same letters of reference are employed in referring to identical parts.

This pile-driver is supported between posts a, towhich it is fastened by dogs a2. These posts are supported upon rollers, allowing its being moved as desired. The cylinder C is also the driver. It slides vertically on the guides f, which are inserted in grooves c on the exterior of the cylinder. lllhe cylinder is made sufficiently heavy to act as a pile-driver.

The cylinder receives the stationary pistonhead h, attached to the fixed piston-rod g, passing through a suitable stuffing-box. lThe piston-rod is attached to the piece c'. Both .the piston-rod and head are hollow, so as to permit the steam to pass through the rod into the head, and then through the opening c into the chamber of the cylinder, between the pistonhead and upper cylinder-head.

Steam is admittedthrough the flexible steampipe into the opening m, whence it passes through the pipe u into the upper end of the piston -rod g, thence into the cylinder C, by

which said cylinder is raised. On the escapev of the steam by means to be hereinafter explained, the cylinder falls by itsown gravity. The steam entering at M passes into a valvechamber inclosing the piston-valve p, which is fitted into a cylinder and is formed with a space left around its middle part between the two ends, as shown in Fig. 5. When the valve is down it cuts oft all communication with the cylinder C, but when raised by the pressure of the steam beyond the port u, the

steam flows below the valve into the cylinder C. The cylinder is thus raised immediately on the introduction of the steam. As it rises it carries with it the arm d sustainingthe wristpin O1, which iits within a slot in the curved arm of the oscillating bellcrank lever f1, which is pivoted at its elbow to the arm g'. The other end of this lever is bifurcated,'for rn ing the yoke f2, the ends of which are pivoted to the vertical yoke t', the top of which has an eye through which passes the stem O of the valve p.

On the sides of the yoke t' are arms t', in the ends of which are eyes through which pass vertical rods which have stay nuts above and below, and the spiral spring t pressing downward on the rods. These rods are pivoted to theI ends of another yoke, t', oscillating on a pivot by which it is suspended, so that the upper point shall oscillate from and toward the valve-stem O. At the top is a wedge-shaped projection, t, Fig. 8, which iits into a corresponding notch cnt out oi' the eye of the yoke i, as shown in the same iigure.

The piston-valve p being chambered about its middle, as described, when the piston is down, the port u being opposite this recess, the steam will iiow back from the cylinder into the chamber around the piston-valve p, whence it escapes through the ports w in the valvechamber into the air. The valve being raised by the admission of the steam, as described, the

cylinder C is raised by the steam thus admit ted above the stationary piston-head. The wrist cl throws outward and upward the ver tical part of the slotted lever f1 drawing down the opposite end, causing the jaw t to close on the collar K on the valve-stem O, and forcing the valve-stem and valve downward, thus opening the communication between the ports u and w, and allowing the escape of the steam from the cylinder C, and its consequent descent. The descent of the cylinder relaxes the hold of the jaw t on the valve stem, so that the valve being free to rise the steam is again admitted to the cylinder and its rapid reciprocating motion effected.

C2 are holes left in the cylinder below the piston-head for the free passage of air. Z is a valve in the bottom of the cylinder, which being raised by each descent of the same, permits the escape of any water that may-be formed by the condensation of steam in the cylinder.

The Ways f are fastened below to circular plates fr r', and have india-rubber pads, on which the entire apparatus is supported, so as to relieve the machinery from the force of concussion.

The sliding clamps n, actuated by set-screws w', are placed between the plates r r', and may be made to seize the head of the pile to be driven, thus holding all parts in their proper relative positions.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. The combination of the valve-stem 0,

forth.

JOHAN JACOB STUDER. Witnesses:

JOHN H. PoPP, ANTON EGLI. 

